Thirty-seven $\gamma$-emitting levels have been observed in ${}_{}{}^{22}{}_{}{}^{}\mathrm{Ne}$ up to an excitation energy of 11.48 MeV following the reaction ${}_{}{}^{19}{}_{}{}^{}\mathrm{F}(\alpha , p\gamma ){}_{}{}^{22}{}_{}{}^{}\mathrm{Ne}$ at $E_{\alpha }=20.0\mathrm{}$ MeV. The decay modes and particle-$\gamma$ correlations of 22 of these levels have been measured. Seven levels of spin 5 or greater have been observed above 8.7 MeV excitation. Extensive collective band structure consistent with the available experimental evidence is proposed.

NUCLEAR REACTIONS ${}_{}{}^{19}{}_{}{}^{}\mathrm{F}(\alpha ,p\gamma )$, $E=20.0\mathrm{}$ MeV; measured $\sigma (E_p, E_{\gamma }, {\theta }_{\gamma }, E_{p\gamma })$. ${}_{}{}^{22}{}_{}{}^{}\mathrm{Ne}$ deduced levels, $\gamma$-branching ratios, $J$, $\gamma$-mixing ratios. Natural target.

• Received 2 October 1975

DOI:https://doi.org/10.1103/PhysRevC.13.953